Found in shallow waters and wet soils this plant grows in thick clumps. Large waxy leaves and a large stalk of purple flowers in the Summer make this a popular water garden plant. Fibrous roots give rise to rhizomes that allow rapid spreading.
Insects and waterfowl make use of the flowers and fruit of the plant. Often used as biological filters in polluted waters. Can become invasive under the right conditions.
Control with proper aquatic herbicides can be achieved.